Help needed on the "bushing-housing fit on an earthmoving machine"
Help needed on the "bushing-housing fit on an earthmoving machine"
(OP)
hi all,
I'm supposed to find out the required fit for the bushing-housing couple of an excavator attachment (boom-arm-bucket). But I dont know what the design methodology should be. There is not any direct lateral force on the attachment that forces the bushings to get out of its housing. There is a lateral force on the tip of the bucket, but there isnt a direct analytical relation between bucket lateral force and axial forces on bushings. This might happen due to the torsion of the boom and distortion of the housing, but this approach is hard to implement(FEA requires time..) WHATS UR RECOMMENDATION?
I'm supposed to find out the required fit for the bushing-housing couple of an excavator attachment (boom-arm-bucket). But I dont know what the design methodology should be. There is not any direct lateral force on the attachment that forces the bushings to get out of its housing. There is a lateral force on the tip of the bucket, but there isnt a direct analytical relation between bucket lateral force and axial forces on bushings. This might happen due to the torsion of the boom and distortion of the housing, but this approach is hard to implement(FEA requires time..) WHATS UR RECOMMENDATION?





RE: Help needed on the "bushing-housing fit on an earthmoving machine"
And when the pin has been assembled like that, and they have to use sledges to drive it out, you don't want the bushing to slide in the housing.
Don't take my word for it. Go out in the shop and ask an Old Fart.
Mike Halloran
Pembroke Pines, FL, USA
RE: Help needed on the "bushing-housing fit on an earthmoving machine"
If the bore is too worn it can be welded and remachined.
http://www.connexusa.com/HTML/principle.html
http:/
ml
RE: Help needed on the "bushing-housing fit on an earthmoving machine"
Russell Giuliano
RE: Help needed on the "bushing-housing fit on an earthmoving machine"
Look over this site to get some idea what it takes to install a bearing such as yours.
http://www.beemerprecision.com/bearingCalc.asp
h
http://www.beemerprecision.com/index.asp
RE: Help needed on the "bushing-housing fit on an earthmoving machine"
Mine is not a bronze one, it's a hardened bushing from 16MnCr5. In fact, I've moved on a little bit (with assumptions of course) and am required the elasticity modulus of the bushing. However, it is a cementited bushing that has a hard surfece and softer core. Any method for calculating an equivalent "E" value to this non-homogenous bushing?
RE: Help needed on the "bushing-housing fit on an earthmoving machine"
Ed Danzer
www.danzcoinc.com
www.dehyds.com
RE: Help needed on the "bushing-housing fit on an earthmoving machine"
RE: Help needed on the "bushing-housing fit on an earthmoving machine"
RE: Help needed on the "bushing-housing fit on an earthmoving machine"
Ed Danzer
www.danzcoinc.com
www.dehyds.com